bin/sh/exec.h

   1 /*      $NetBSD: exec.h,v 1.20 2003/01/22 20:36:04 dsl Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Kenneth Almquist.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)exec.h      8.3 (Berkeley) 6/8/95
  35  */
  36
  37 /* values of cmdtype */
  38 #define CMDUNKNOWN      -1      /* no entry in table for command */
  39 #define CMDNORMAL       0       /* command is an executable program */
  40 #define CMDFUNCTION     1       /* command is a shell function */
  41 #define CMDBUILTIN      2       /* command is a shell builtin */
  42 #define CMDSPLBLTIN     3       /* command is a special shell builtin */
  43
  44
  45 struct cmdentry {
  46         int cmdtype;
  47         union param {
  48                 int index;
  49                 int (*bltin)(int, char**);
  50                 union node *func;
  51         } u;
  52 };
  53
  54
  55 /* action to find_command() */
  56 #define DO_ERR          0x01    /* prints errors */
  57 #define DO_ABS          0x02    /* checks absolute paths */
  58 #define DO_NOFUNC       0x04    /* don't return shell functions, for command */
  59 #define DO_ALTPATH      0x08    /* using alternate path */
  60 #define DO_ALTBLTIN     0x20    /* %builtin in alt. path */
  61
  62 extern const char *pathopt;     /* set by padvance */
  63
  64 void shellexec(char **, char **, const char *, int, int)
  65     __attribute__((__noreturn__));
  66 char *padvance(const char **, const char *);
  67 int hashcmd(int, char **);
  68 void find_command(char *, struct cmdentry *, int, const char *);
  69 int (*find_builtin(char *))(int, char **);
  70 int (*find_splbltin(char *))(int, char **);
  71 void hashcd(void);
  72 void changepath(const char *);
  73 void deletefuncs(void);
  74 void getcmdentry(char *, struct cmdentry *);
  75 void addcmdentry(char *, struct cmdentry *);
  76 void defun(char *, union node *);
  77 int unsetfunc(char *);
  78 int typecmd(int, char **);
  79 void hash_special_builtins(void);